Wiggins type dry gas storage tank structure installation and construction method Meng Qinghua, Jiao Hongfu, Shi Mingjie, China Metallurgical Northeast Construction Co., Ltd. Structure Manufacturing and Installation Engineering Company, Liaoning Anshan 4, 31 Overview Wiggins dry gas storage tank is a typical Dry gas storage tank, which uses rubber membrane to seal gas, is a kind of dry gas storage tank sealed by Shuzhou liquid medium. It has large gas consumption per unit time, easy maintenance and good sealing effect. It is suitable for converter gas system and meets the converter. The characteristics of large gas production during the short steel production cycle. Based on years of experience in construction practice, our company has compiled a set of practical and complete methods and methods. In the process of lifting the rubber film of the tank top structure, the self-made multi-point lemon whole lifting method is adopted, and the lifting device has obtained the national patent.

The tank rest installation and the following features, the tank body is installed by the mounting method, that is, from bottom to top, layer by layer installation. The side plate of the column is clear, and the operator is easy to master.

2 Adopting the internal multi-point numerical control overall lifting method, the installation tank top structure is improved, the lifting point distribution is uniform, and the force is applied to realize the large-area thin shell structure to be smoothly upgraded. Simple and convenient.

Process facilities economy Hezhou has good economic benefits.

2 tank structure and installation process The Wiggins item ten gas storage tank is sealed with synthetic rubber membrane. The structure of the tank rest is composed of the steel spherical arched floor column and the outer side of the side panel and the anti-wind truss spherical arched tank top. What is the shape of a thin clam? There are 4 spherical arch pistons running up and down. The middle section of the ring truss structure between the piston side plates is commonly called the Ding baffle. The sealing rubber film is divided into two sections, which improves the bearing capacity of the sealing rubber film. The sealing rubber film is arranged on the inner and outer sides of the slab, the inner ring is connected between the stern plate and the piston, and the outer ring is connected between the side plate and the sill plate, so that the sealing system becomes a two-stage sealing structure. Tank structure profile

The installation process is divided into 7 stages. The construction procedures for each stage are as follows: The first stage of the 51st machine is used for the site, temporary facility preparation; basic retesting, line positioning; floor laying; floor welding, vacuum inspection; piston plate laying Piston plate welding, vacuum inspection; piston outer ring beam assembly, welding.

The second stage tank top beam is installed and adjusted for welding; the tank top plate is adjusted and welded; the tank top vent cap is installed.

The third stage base column installation adjustment is the same; side plate assembly; side plate installation adjustment welding; wind-resistant truss platform installation fixed welding; tank outer steel ladder installation and fixed.

Installation and commissioning; tank top lifting; tank top 9 side, joint welding in place; tank top side ring plate laying in place welding.

The fifth stage Ding throwing plate system installation; Ding baffle system installation; Piston support system installation; Guide wheel system installation and adjustment; Corrugated protection plate installation and adjustment; External leveling device system installation and welding; Dispersion system installation and welding; Body inlet and outlet take over and install welding.

The sixth stage piston plate is polished, and the fire-fighting equipment is quasi-civilized; the sealing rubber film is transported into the tank to open the box; the side wall of the tank door is closed; the sealing rubber film is hoisted with the hoist system; the outer sealing film is connected with the tank The wall connection is fixed, 1 port is fixed with 1 baffle; the inner sealing film is hoisted in position; the upper sealing film is connected with the baffle plate and the lower 1 is connected with the piston; comprehensive inspection; piston support column connecting pipe opening reinforcement The plate and the support are welded; the air is filled into the air, the piston is raised; the support column is inserted; the manhole is opened, and the bottom ring weld of the piston plate is welded into the lower part of the piston; the support column is pulled out of the piston.

Installation and commissioning of the 7th stage plume electrical system; installation and commissioning of gas and air inlet and outlet valves; piston lift test; air tightness test; gas replacement; handover to the owner;

3Operation points: Laying of the top plate of the piston plate and the laying and welding of the welding plate. 3. With the basic center point as the standard, the erecting device is used to mark the reference lines perpendicular to each other in four directions, and the cross positioning plate is marked on the basis. For a quasi-position, confirm the position of the center plate and the edge ring plate. The welder is symmetrically distributed during the welding of the bottom plate, and the welding is performed by segmental jump welding or back-welding. After the welding, the tightness test was carried out by using the vacuum method of 27 kPa, and the leak-free medium was used.

Piston plate laying bow welding welding inspection requires the same bottom plate.

3. Make sure that the ring beam side plate and the branch casing opening position are positioned and positioned.

It is necessary to ensure the curvature and verticality of the side plates when assembling the side plates and the stiffeners. = Symmetrical distribution of electric welding, segmental jump welding or back welding when the side plates of the ring beam are welded to reduce uneven deformation.

4 tank top beam and tank top plate laying and welding 3. When the side ring vertical plate is installed and positioned, check the side ring vertical plate assembly positioning shield according to the positioning point line and the elevation point, and temporarily fix the curved plate with support.

The side plates of each layer connected to the base column are installed after the base column adjustment grid. The welding adopts the same welding parameters, symmetric welding, and the welding seam is welded first.

Subsequent columns are plated, and the wind-resistant truss adopts the expansion of the ping method. The two columns of each column and the side panel wind-resistant truss are assembled into a whole and then hoisted in place. The remaining side panels are assembled into large blocks for lifting and adjustment. Qualified; 77 unified symmetrical welding.

3.3 The tank top hoisting side wall system is installed and welded, and the tank top system hoisting operation is carried out after checking the compartment.

3. The installation and adjustment of the tank top hoisting system is flexible according to the tooling design.

The installation and commissioning of the multi-point CNC electric hoist system was completed.

The personnel carry out strict inspection and hoisting process on the wire ropes of each node of the hoisting system along the wheel hoisting machine in stages, and each lifting point is evenly stressed.

deal with.

3.4 Rubber film hanging, the piston plate is polished, and the rubber film can be transported inside the tank.

2 cans increase operation 1±, and 1 work for hot work should be completed.

All the lifting points of the wire ropes should be smothered and directed by the person to prevent the tearing of the rubber film.

After the rubber film is hoisted in place, strictly check the upper and lower points of the connection with the sealing ring.

3.5 Leveling device installation adjustment Leveling system pulleys should be rotated. The wheel of the unit should be on the 叼 axis and cannot be offset.

With 5 pieces of 拴 hanging position 高 mark high, smooth and smooth, hanging, after fixing, use spring balance to check the tension of each set of wire rope, adjust the elastic stand, make it as much as possible. 3.6 Overall commissioning and airtightness test of gas storage tanks Piston lifting test The first time the gas must be raised to the top in the whole process, the inner and outer rubbers are completely dismantled, and then 0 is returned to the initial position to ensure that the rubber film is free from wrinkles.

1. Each time the initial stage of inflation and buoyancy must be slowly inflated, the bottom surface of the ring beam can be inflated quickly after the bottom of the ring beam exceeds the inlet and outlet gas 1 pipe, so as to avoid the offset of the piston position and the position should be performed accordingly.

Air tightness test 1 according to the regulations and regulations, inflating to the top position close, close the fan and each valve, static condition 7 nights and nights, check the residual effect effect during the rest period, the following parts should be strictly checked for tightness. The joint weld of the groove steel of the film; the joint of the side plate and the gas, the weld; the contact of the piston plate ring beam with the gas part 4 construction materials and implements, the construction materials, the installation of the roadbed box assembly platform tank top beam assembly branch, The gantry tank top hoisting frame is equipped with a guide wheel and a pulley side hoisting device with a rubber film hoisting ring side plate transport gantry side plate mounting welding operation frame and the like.

Construction equipment, belt type 1 car crane AC welding machine, gas welding machine angle polishing machine vacuum leak detector level gauge theodolite blower infrared electric heating drying paint film measuring instrument electric hoist ultrasonic flaw detector photoelectric range finder.

5 quality control measures 5.1 implementation standards, design documents, design instructions, technical agreement debugging, and so on.

Cheng Shiding quality acceptance specification 08523519971 industry metal pipe Ding. Cheng Shiding. And acceptance specifications, 8 501841993 industrial gold domain symbol 逍 engineering inspection test evaluation of your standard 81202 construction steel structure welding technical regulations 819 roller blind sealing difficult gas storage tank installation engineering quality inspection and evaluation standards.

5.2 Key Process Construction Quality Control 3 1 Before the installation of the column, check the apricot shape and geometric shape of the groove.

15. The foundation is the basis for the subsequent installation of the column and the top of the tank. The installation process must strictly meet the specified quality and accuracy before installing the subsequent column.

The control axis verticality control point of each column is directly led from the ground control axis to eliminate the accumulation error. For each side plate installed, the secondary column diameter tangential electric straightness must be measured. If the change or the tolerance is changed, adjust it in time. .

During the side plate welding process, the welding speed is maintained as much as possible, and the tangential sag and chord length of the column are tracked and monitored.

Piston slab system installation quality screwing piston ring beam must be measured according to the gas storage tank before installation, the reference point is placed and positioned, and the ring beam side plate is assembled according to the reference line. The baffle frame of the piston frame is fixed. .

3. Before lifting, make sure that the lifting wire rope of each hoist is evenly stressed.

1. Staged improvement, stage inspection, and wire rope stress.

3. After reaching the installation island degree, it is necessary to precisely adjust the outer bad mark and the gap with the side plate.

4 Sealing rubber off-loading felt control 3. Strictly control the hole making precision and installation position of the sealed iron parts.

1. When the rubber film of the joint node of the rubber film iron piece is symmetrically segmented and placed in position, the lifting speed is maintained.

5.3 process control main billion order stop check apricot point control private sequence process 1 winter 2.

Component manufacturing Jiading. Inspection Foundation Acceptance Measurement Discharge Flooring Laying Welding Vacuum Leakage Piston Plate Laying Welding Vacuum Leakage Piston Ring Beam Installation Welding Tank Top Beam Installation Adjustment Welding Tank Roof Laying Welding Column Windproof Truss Side Plate Installation Tank Top Lifting Position Ding Bezel Table Piston baffle system installation Ding baffle system installation adjustment rubber film hoisting in position leveling device installation and commissioning piston soaring pillar installation piston plate back welding seam welding paint air tightness test handed over to the owner 停 factory stop inspection back to stop Supervision process inspection, 5.4 key quality control indicators key quality control indicators 1.

Test item control index Base column radial allowable deviation mm tangential allowable deviation mm, 枉 radial allowable deviation mm vertical subsequent column tangential allowable deviation mm degree full height radial allowable deviation mm tangential allowable deviation mm piston bracket verticality radial allowable Deviation mm tangential allowable deviation mm The angle between the angle and the baffle on the baffle gantry is allowed to deviate mni bracket verticality radial allowable deviation nim tangential allowable deviation mm baffle top beam and side spacing allowable deviation, tilt allowable deviation mm bad pressure Changed pressure change Pa estimated in the autumn seal lift allowable deviation mm test ancestral seal limit outer seal. 1OA allowable deviation, sexual test leakage rate test 6 safety measures In addition to complying with the national safety regulations and the relevant internal safety regulations of the industry, it should also comply with the requirements, all construction work scaffolding platforms use special scaffolding, set standard maintenance aging rod, Anti-high-altitude.

Pay special attention to electricity protection, set up full-time personnel to check and maintain.

The piston is used for the float, and the blower is equipped with full-time personnel for operation and maintenance.

Various tooling fixtures and joint bolts for temporary brackets, etc., pre-considering mustard seed and strengthening the check.

The hoisting hoist system for tank top lifting shall be provided with a stable device, and the control system shall be strictly inspected.

In the summer when the sky rains in the sky, take measures to prevent lightning.

If construction is carried out in a flammable and explosive area, before the start of construction, the Ministry must work with the relevant departments of the owner to establish a safety fire prevention agreement for the actual situation of Ding Cheng.

Construction gas paints, etc. shall be stored in isolation according to regulations, and special personnel shall be provided for stone protection, and fire prevention equipment shall be fully equipped.

7 Environmental protection measures, around the site of the Shi 1 site, according to the application, the construction site needs to be demarcated, and the residents' residences or other production plants are separated to reduce the damage and the greening facilities such as green belts and trees inside and outside the site.

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8 Conclusion 1 This application, in the installation of the tank top structure, the equipment is not used in the construction of the tank top, and the cost of lifting and lifting equipment is about 20101 yuan. The construction of 8 Weijinsi dry gas storage tanks is taken as an example.

Solved the contradiction between construction, quality and quality control, while controlling the quality of the construction, and greatly reducing the cost of quality rework, accounting for about 5.

The safety of high-altitude operations improves the working environment of construction workers and enables construction to be carried out safely.

I Zhongyu 7th Metallurgical Stop Company Structure Manufacturing and Installation, Cheng Company. The rubber membrane sealed type gas storage cabinet is thin and must be multi-point CNC lifting device. China Patent B 200620093256.2, 2007 07.2 buckle 812002, the structure of the welding technology regulations.

Dongjing City plans to build 60 natural gas refueling stations. Dongguan Development and Reform Bureau has released special planning and design procurement items for natural gas automobile refueling stations in Dongguan. From 2,8 to 2,2, Dongguan will plan to build 60 Natural gas vehicle filling station.

It is reported that in 2008, 2010 is a near-term plan, Dongfan City will build 20 dedicated gas refueling stations, including Dongcheng and Nancheng construction 2, Wanjiang Shilong Naobu and other 16 towns and streets to build one. In the 20th, 2nd, and 2nd year, for the medium and long-term planning, 4 natural gas vehicle refueling stations will be built.

The Dongshi Natural Gas Vehicle Refueling Station Regulations are for the four districts of the Nancheng Dongcheng Wanjiang and the 28 towns and the Songshan Lake Science and Technology Park. The site should consider the high gas of the Jinli ship, the network and the ship have some The station and the pick-up station are running at the Feifeizi station and the Shenghe refueling station, which can meet the demand of 400,600 natural gas vehicles per day. 9=, Dongying will modify 5 taxis and 3 buses. Qing materials, the city's bus 9, the above taxis must use natural gas, and the private car temporarily does not consider the oil to gas this journal correspondent feed

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